Seed drill



Nov. 11 1924.

Filed Dec.

1 mm i B. s. HARRIS SEED DRILL 15, 1922 2 Sheets-Shed! l INVENTDR.

'N v."11 ,1924. I nslvmoo B. s. HARRIS TSEED DRILL Filed Dee 16, 1922' 2Sheets-Shoot 2 as o liner BURTON HARRIS, OF TORONTO, GNTARIO, GANADA,ASSIGIEOE' TO MASSEY-HARRIS.

' COMPANY, LlIlVLITED, 6H TORONIQ, ONTARIO,CANADA.

'snnn 113.111..

Application filed December To all whom it may concern:

Be it known that I, BURTON S. l'lnnnis. of the city of Toronto, in thecounty of York Province of Untario, Canada, have invented certain newand useful Improvements in Seed Drills, of which the following is aspecification.

This invention relates particularly to seed drill axles used foractuating means for lifting the drills to provide road clearance and myobject is to so construct the axle that the wheels carried thereby willhave the necessary pitch and gather to ensure an easy running machinewithout interfering with the operation of the drill lifting means.Further objects l have in mind will hereinafter appear.

I attain my objects by means of the constructions described, andillustrated in the accompanying drawings in whicl Fig. 1 is a plan viewof a seed drill show ing my invention applied thereto;

Fig. 2 a rearelevation of the same; and

Fig. 3 a cross section of a seed drill.

In the drawing like numerals of reference, indicate corresponding partsin the different figures.

1 is the frame of the seed drillwhich is carried by the axle 21 ashereinafter described. T he disc drills 3 are journalled on the dragbars 4 which-arepivotally mounted on the forward transverse portion 1 ofthe frame- 011 each drag bar adjacent its disc journal is pivotallyconnected one end of a spring pressure bar 5, the other'end of which ispivotally connected with an arm 7 secured to the control shaft 8. lhisshaft is formed in two parts each part being journalled on the frame andadapted to be rocked to raise and lower the discs at its end of themachine.

To mechanically ope ate the control shaft 8 from the axle 2 I providethe following means. At each end of the is carried a ground wheel 9,each wheel having a driving connection, by means of a clutch or ratchetdevice (not shown) with the axle so that the latter will be rotated whenthe machine is turning a short corner and only one wheel is in motion.In front of each half of the control shaft 8 is a clutch 11 suitablycarried on the frame. As these clutches are old in the art and are shownin United States Patent 1,168,143, only a brief description is given.Each clutch is provided is, 1922. Serial No. 607,449.

with a constantly rotating part, having a sprocket 182. secured thereto.This sprocket is driven by means of a chain carried by a sprocket 1secured to the axle 2. Each clutch is also provided with a shaft 1 1having a crank 15 formed on its free end and this crank is connected bymeans of a link 16 with. the arm 17 secured to one half of the shaft Therotation of the crank shaft 14 from the sprocket wheel 18 is controlledby means of a projection 18, carried on a pivoted arm 19, adapted toengage either oneof a pair of spaced fingers 20 pivoted on the part ofthe clutch which carries the shaft 1 1. lhese fingers are substantiallydiametrically opposite one another and' when the arm 19 is rocked todisengage the projection 18 from itsfinger, the latter au tomaticallythrows the clutch into gear. his rotates the cranlr shaft 1% through anarc of substantially 180 then the second lingerie automatically engagedby the projection 18 to throw the clutch out of gear.

To disengage the rollers 18 from the fingers 20 the arms 19 are eachprovided with a pair, of holes 21 positioned so .hat the arm may bepulled forward or pulled upward to swing it on its pivot by a cord 24secured to either one pair of holes to opcrate the clutches from atractor in front of the seed drill or from a position behind the seeddrill.

Assuming the discs to be raised out of the ground as shown in Fig. 3, itis evident that a pull on the cords will throw the antifriction rollers18 out of engagement with one pair of fingers 20 and thus throw theclutches into gear so that the crank shaft 14: is rotated to rock thecontrol shaft and lower the discs into the ground. It is necessary tohold the rollers 18 away from the clutch until the fingers 20. that havebeen in engagement with the rollers. are rotated sufficientiy to clearthe rollers when the latfor are released and springs 23 hold the rollersin position against the periphery of the clutch so that they drop intoengagement with the other pair of fingers 20, when the clutch has beenrotated through an arc of 180, and thus throw the clutch out of gear.hen it is desired to raise the discs again the rollers 18 are disengagedfrom the second pair of fingers 20 and the clutch is rotated until thefirst pair of fingers become engaged by the rollers.

i i i This method of lifting and lowering the discs out of and into theground is old in the art but heretofore it has been the custom to use astraight axle mounted transversely on the frame and rotated by eitherwheel. This straight axle has proved a failure on account of it bendingout of line due to the weight of the seed carried by the seed box 25 andthus throwing the wheels 9 out of line. To overcome this objectionablefeature I provide an aXle which is driven by either wheel and the endportions of which are set at an angle to the horizontal and to thevertical to give the wheels the desired pitch and gather. This axle isformed in three parts ;-a centrally located portion 2 which portion isjournalled parallel -with the frame on the brackets 26, and the endportions 2 which are journalled in the end bearings 27 and brackets 28.These bearings and brackets are carried on the frame and are set at anangle to the vertical and to the horizontal. The centrally locatedportion 2 carries the sprockets l3 and each end of this portion isconnected by means of a universal joint 29 with the adjacent endportions 2 so that when either drive wheel is rotated the clutches maybe operated to lift or lower the discs 3. c

To adjust the clearance of the discs 3 from the ground or the depth ofthe fur rows the link 16 is formed, by the'bars 16 and 16 in two parts.One part is slidably carried on the other whereby the link may beshortened or lengthened to slightly advance or retard the rockingmovement of the arm 17. This is accomplished'by pivotally connecting oneend of the bar l6 on the crank 15 and pivotally connecting the oppositeend of the bar 16 on the arm 17. The bars are guided on one another bymeansof the pin and slot connections 34:. To 'adjust one bar relative tothe other and releasably lock it as adjusted I provide the hand lever 31fulcrumed on a depending portion of the bar 16 and adapted to bereleasably locked in the notched quadrant 36 formed on this bar.

' The lever 31 is provided with a laterally tion it is obvious that amovement in either direction of the lever 81 Will slightly rock theshaft 8 in. the same direction to slightly lower or raise the discs andthus cause them to be further lowered into the ground or further raisedfrom the surface of the gound on the next semi-revolution of the crank15.

ll hat I claim as my invention is 1-- l. A seed drill provided withlifting meansfor the drills including an adjustable link formed in twoparts suitably guided on one another; a notched quadrant formed on onepart; a clever pivoted on the last mentioned part and adapted to beengaged with the quadrant; and a pin and slot connection. between thelever and the other part whereby one part of the link may be movedrelative to the other.

2. A seed drill provided with lifting means for the lrillsincluding anvadjustable link formed in two we, suitably guided on one another, onepart havingv a slot formed therein; a notched quadrant formed on theother part, said part having an arcuate slot formed therein; a leverpivoted on the last mentioned part and adapted to be engaged with thequadrant; and a pin carried on'the lever passing through said arc-uateslot and engaging the first mentioned slot.

Signed at Toronto Canada, this 28th day of November, 1922. l

BURTON S. HARRIS.

